Wilhelm Fraenger (5 June 1890 – 19 February 1964) was a German art historian.
He was a specialist in the epoch of the German Peasants' War and of the mysticism of the Late Middle Ages.
He wrote important studies of Jerg Ratgeb, Matthias Grünewald and Hieronymus Bosch.
He maintained friendships with numerous artists and intellectuals, some stretching decades.
This biographical article about a German art historian is a stub.